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Sbornik materiali ot Dvustrannata Bălgaro-Rumănska Konferencija "Naučni Problemi na Reka Dunav" : 4 - 7 noemvri 1983, Varna ; 7 - 10 noemvri 1983, Tulča
Zachariev, Ivan (contributor) - Bilateral Bulgarian Romanian Conference Scientific … - 1985
Persistent link: https://www.econbiz.de/10014385403
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Priroda i resursi
Mišev, Kiril (revision) - 1989
Persistent link: https://www.econbiz.de/10000805853
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Problemi na sobstvenostta i polzvaneto na zemedelskata zemja v Bălgarija
Janakieva, Ivanka; Risina, Marija; Dimitrov, Dimităr; … - 2006
Persistent link: https://www.econbiz.de/10003412920
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Metodičeski podchod za vzemane na rešenija pri prerazpredelenieto na zemedelskite zemi v Bălgarija
Kăneva, Krasimira - In: Ikonomičeska misăl 38 (1993) 6, pp. 33-43
Persistent link: https://www.econbiz.de/10001157500
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Počvena karta na Bălgarija
Institut po Počvoznanie i Agrotechnika Nikola … - 1968
Persistent link: https://www.econbiz.de/10000679393